Fortnite asset reverts properties to defaults when in-game (torch example)

For this example, I’m trying to emulate an iron burner with a Fortnite asset called: CustomizableLight IceCastle Torch

This torch is exactly what I need as I can hide its base and only leave the customizable fire VFX.

The problem is that in-game, the “Base visible” property, which I set to false, is not taken into account and you can see the base anyway. (goes back to its defaults).

Here’s an editor vs. in-game screenshot of the same actor.

And the property in question:

FYI, this also happens to other Fortnite assets. When launching the map inside Fortnite, many properties are reverted to their defaults.

Is there anything I can do? is this a bug? it it known?

Thanks!